Ring Size Conversion Chart

Know your ring size but don't know what it is in our US sizes? Scan below to find your size and see how it converts. The sizes we use for all our pieces are US sizes:

Size 6.5   |    Size 8    |    Size 9.25    |    Size 10.25    |    Size 11    |    Size 12

Inside Diameter 

Inside Circumference

Sizes By Country

MM

INCH

MM

INCH

British & Australian

US & Canada

French & Russian

German

Japanese

Swiss

14.86

0.585

46.68

1.84

H 1/2

4

-

15

7

-

15.04

0.592

47.25

1.86

I

4 1/4

47 3/4

-

-

7 3/4

15.27

0.601

47.97

1.89

I 1/2

4 1/2

-

15 1/4

8

-

15.40

0.606

48.38

1.90

J

4 5/8

49

15 1/2

-

9

15.53

0.611

48.79

1.92

J 1/4

4 3/4

-

-

-

-

15.70

0.618

49.32

1.94

J 1/2

5

-

15 3/4

9

-

15.80

0.622

49.64

1.95

K

5 1/8

50

-

-

10

15.90

0.626

49.95

1.97

K 1/4

5 1/4

-

-

-

-

16.00

0.630

50.27

1.98

K 1/2

5 3/8

-

-

10

-

16.10

0.634

50.58

1.99

L

5 1/2

51 3/4

16

-

11 3/4

16.30

0.642

51.21

2.02

L 1/4

5 3/4

-

-

-

-

16.41

0.646

51.55

2.03

L 1/2

5 7/8

-

-

-

-

16.51

0.650

51.87

2.04

M

6

52 3/4

16 1/2

12

12 3/4

16.71

0.658

52.50

2.07

M 1/2

6 1/4

-

-

-

-

16.92

0.666

53.16

2.09

N

6 1/2

54

17

13

14

17.13

0.674

53.82

2.12

N 1/2

6 3/4

-

-

-

-

17.35

0.683

54.51

2.15

O

7

55 1/4

17 1/4

14

15 1/4

17.45

0.687

54.82

2.16

O 1/2

7 1/4

-

-

-

-

17.75

0.699

55.76

2.20

P

7 1/2

56 1/2

17 3/4

15

16 1/2

17.97

0.707

56.45

2.22

P 1/2

7 3/4

-

-

-

-

18.19

0.716

57.15

2.25

Q

8

57 3/4

18

16

17 3/4

18.35

0.722

57.65

2.27

Q 1/2

8 1/4

-

-

-

-

18.53

0.729

58.21

2.29

Q 3/4

8 1/2

-

18 1/2

17

-

18.61

0.733

58.47

2.30

R

8 5/8

59

-

-

19

18.69

0.736

58.72

2.31

R 1/4

8 3/4

-

-

-

-

18.80

0.740

59.06

2.32

R 1/2

8 7/8

-

-

-

-

18.89

0.748

59.34

2.35

R 3/4

9

-

19

18

-

19.10

0.752

60.00

2.36

S

9 1/8

60 1/4

-

-

20 1/4

19.22

0.757

60.38

2.38

S 1/4

9 1/4

-

-

-

-

19.31

0.760

60.66

2.39

S 1/2

9 3/8

-

-

-

-

19.41

0.764

60.98

2.40

S 3/4

9 1/2

-

19 1/2

19

-

19.51

0.768

61.29

2.41

T

9 5/8

61 1/2

-

-

21 1/2

19.62

0.772

61.64

2.43

T 1/4

9 3/4

-

-

-

-

19.84

0.781

62.33

2.45

T 1/2

10

-

20

20

-

20.02

0.788

62.89

2.48

U

10 1/4

62 3/4

-

21

22 3/4

20.20

0.797

63.46

2.50

U 1/2

10 1/2

-

20 1/4

22

-

20.32

0.800

63.84

2.51

V

10 5/8

63

-

-

23 3/4

20.44

0.805

64.21

2.53

V 1/4

10 3/4

-

-

-

-

20.68

0.814

64.97

2.56

V 1/2

11

-

20 3/4

23

-

20.76

0.817

65.22

2.57

W

11 1/8

65

-

-

25

20.85

0.821

65.50

2.58

W 1/4

11 1/4

-

-

-

-

20.94

0.824

65.78

2.59

W 1/2

11 3/8

-

-

-

-

21.08

0.830

66.22

2.61

W 3/4

11 1/2

-

21

24

-

21.18

0.834

66.54

2.62

X

11 5/8

66 1/4

-

-

26 1/4

21.24

0.836

66.73

2.63

X 1/4

11 3/4

-

-

-

-

21.30

0.839

66.92

2.64

X 1/2

11 7/8

-

-

-

-

21.49

0.846

67.51

2.66

Y

12

67 1/2

21 1/4

25

27 1/2

21.69

0.854

68.14

2.68

Y 1/2

12 1/4

-

-

-

-

21.89

0.862

68.77

2.71

Z

12 1/2

68 3/4

21 3/4

26

28 3/4

22.10

0.870

69.43

2.73

Z +1/2

12 3/4

-

-

-

-

22.33

0.879

70.15

2.76

Z+1

13

-

22

27

-

22.60

0.890

71.00

2.80

Z+1.5

13.5

-

-

-

-

 
If you're above or below by 0.25(US) of a size, the difference is not noticeable. Most of us wear our rings slightly different from the size we measure too. Although once you hit a 1US size difference, it's usually too loose or tight to wear comfortably.

Why do we use US sizes when we're Australian? Their system just honestly made more sense to us ;).

Don't know your ring size? Check out our measure at home ring size method below! And any questions reach out via Instagram or the contact us page.

FIND MY RING SIZE